Gaseous-fuel burner



June 16, 1925.

, J. v. ROBERTS GAsEoUs FUEL BURNER Filed June 12. 1924 0&1@

n/E/V fc5/e9 wwf-7% Il?? f' burners;

f pressure iet pipe hPaten'ted June 16, 1925.

JOHN V. Renners, or Los ANGELES, canrroganrs.

.erasmus-FUEL Bus-una.

appli-reason nieuwe 1a, i924. seria.; up.v 713,524,

To aZZ whmn t may concern# Be it known that 1,-JorrN V. yRoannais, acitizen of the United` States, residing at 'Los Angeles, in the countyk'ofLoS 4Angeles and State 'of California, haveV invented certain new anduseful'improvements in gaseous,- Fuel Burners, of which tliefollowing isa specification.

My invention relates generallyto heating and steam generatingV,appliances and more particularly .to a gaseous fuely burner, theprincipal objects ofmy invention being, to generally improvel upon andsimplify the construction of theeristing forms lolif' similar to providea burner that ivill'be highly een't in the humilla ef fuelsueh as crudecil, rened liquid .hydro-carbone or the lileytoconstruct the burner sothat the gaseous 'fuel th t passes through thesame ivillbe superheatedand ,consequently vaporized. to a `relatively high degree befureitreaches the point of ignition at the jet open-` ing of the burner ornozzle and furthe?, t provide' a burner of the'character referred tothat maybe easily and cheaply produced and installed for use in afurnace or the like.

With the foregoing and other objects in View, my invention consists incertain novel features of construction and arrangement of parts thatwill be hereinafter more fully describe-d and claimed and illustrated inthe accompanying drawings, in Which:

Fig. 1 is a vertical section taken through the central portion of thefire boX of a boiler furnace and showing my improved burner positionedfor use therein. t

Fig. 2 is a longitudinal section take-n through the front portion of theupper tubular leg of the burner and showing the fiuid therein.

Fig. 3 is an enlarged section taken on the line 3-3 of Fig. 1.

Fig. 4 is an enlarged horizontal section taken on the line 1 -L1 of Fig.1.

Where my improved burner is used for heating a boiler furnace asillustrated in Fig. 1, a tube 10, of sufficient length to eX- tendthrough the fire box B of the furnace is secured in any suitable manner,preferably by means of a collar 11 to the fire door or front Wall of thefurnace and the outer end of this tube is screw-seated in the inner endof a reducing nipple 12. y

Connected to this nipple, preferably the top thereof and near itscent-er is a tube 13 that leads from a suitably located liquidhydro-carbon supply tank and'y arranged in said tube 13 adjacent tothenipple is a manuallyoperable Oil flow' contrqlvalve 141.

Screw-seated in the smaller outer end of the nipple 12 is a relativelysmall tube 15 that exten-ils for a substantial distancefartin allythrough the larger tube 10.

Thissmall tube 15 is connected to asuitable source of fluid' pressurelsupply either steam or compressed air and located in'said tube adjacentto the nipple is a;fluid pres-` sure flow controlvalve 16.

The rear oi";inner end oftube 10 is connected by a. return bend 17 tothe inner or rear. ,end cfa tube 18 that occupies a position justbeneathand .parallel vWith said ytube 10 and said tube 18 extends .forwardlythroughthefire `box B of the furnace to a point adjacent tothe frontwallF ofthe* furnace.

. y.The ferivard'end of tube 1S is connected i bya return bend or nipple19 tothe forward end of a short tube 2,(lthat vprpjepts"a ys lrortdistante rearwardly .in `the fue hex and which occupies a positiondirectly beneath and parallel with said tube 18.

The rear end of short tube 20 carries a burner head 21, preferably aT-union having the ends of its vertical leg closed by plugs such as 22and, formed in the rear portion of the Wall of the vertical leg of thisunion is a'horizontally disposed slot 23 that performs the functions ofa jet orifice. n n

In the operation of my improved burner, valve 16 is opened to permitfluid pressure, either steam or compressed air through tube 15 and thisfluid pressure discharging from the rear end of said tube creates acertain degree of suction through the forward portion of tube 10 and thefitting 12 so that, When valve 111 is opened to admit liquidhydro-carbon through supply pipe 13, said yliquid hydro-carbon will beforciblyk drawn through tube 10.

The flame resulting from combustion of the gaseous fuel discharging fromjet orifice 23 Vheats the rear portions of tubes 10 and 1S to arelatively high degree, with the result, that the liquid hydro-carbonpassing through said tubes with the fluid pressure Will, as a result ofthe high temperatures, become Very thoroughly vaporized and, in suchcondition it will mix with said fluid pressure and form a highlycombustible mixture that ignites readily and burns with a relativelyhigh degree of heat as it discharges from jet orifice 23.

In the event that steam is the fluid pressure that is admitted to theapparatus through pipe 13, then said steam, in passing through tubes 10,18 and 2O will become superheated at the same time that it is mixingwith the hydro-carbon vapor and this superheating effect adds materiallyto the combustible qualities of the gaseous fuel mixture.

I have found in practical use, that best results are attained byextending tube 15 a substantial dist-ance into tube 10 and in Fig. 1said tube 15 is shown as terminating a 1shot distance inwardly from theburner iea Thus it will be seen that I have provided a gaseous fuelburner that is relatively simple in structure, capable of being easilyand cheaply produced and which may'be economically and advantageouslyused for all heating' purposes and particularly for the generation ofsteam in boilers.

It will be understood that minor changes in the size, form andconstruction of the various parts of my improved gaseous fuel .burnermay be made and substituted for those herein shown and described withoutdeparting from the spirit of the invention, the scope of which is setforth in the appended claim.

I claim as my invention:

A gaseous fuel burner comprising an elongated tubular member that isarranged to form a pair of relatively long legs, one of whichis disposeddirectly above the other and a third relatively short leg that isdisposed directly beneath the front end portion of the lower one of saidlong legs,a reducing nipple on the forward end of the upper one of thelonger tubular legs, a fluid fuel supply pipe connected to said reducinglonger leg for approximately half its length, a fluid pressure supplypipe connected to said reducing nipple, a short vertically disposedhollow cylindrical burner head connected to the rear end of the shorttubular leg, said burner head being disposed forwardly with respect tothe rear end of the fuel supply pipe in the upper one of the long legs,plugs removably seated in the upper and lower ends of the cylindricalburner head and said burner head being provided its rear wall with acentrally arranged horizontally disposed slot that occupies the sameplane with the center of the short leg to which said burner head isconnected, so that the fluid fuel mixture that discharges through theshort lower tubular leg, passes directly across the chamber Within saidburner head and discharges through the jet orifice formed by saidhorizontally disposed slot.

In testimony whereof I affix my signature.

JOHN V. ROBERTS.

nipple and into and through the upper

